142069777 has 4 divisors (see below), whose sum is σ = 142097956. Its totient is φ = 142041600.

The previous prime is 142069769. The next prime is 142069787. The reversal of 142069777 is 777960241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777960241 = 439 ⋅1772119.

It can be written as a sum of positive squares in 2 ways, for example, as 135699201 + 6370576 = 11649^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 142069777 - 2³ = 142069769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142069717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4224 + ... + 17377.

It is an arithmetic number, because the mean of its divisors is an integer number (35524489).

Almost surely, 2^142069777 is an apocalyptic number.

It is an amenable number.

142069777 is a deficient number, since it is larger than the sum of its proper divisors (28179).

142069777 is an equidigital number, since it uses as much as digits as its factorization.

142069777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28178.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 142069777 is about 11919.3027061150. The cubic root of 142069777 is about 521.7957845845.

The spelling of 142069777 in words is "one hundred forty-two million, sixty-nine thousand, seven hundred seventy-seven".